Calculation of Metal Springs Quiz

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Questions and Answers

What is the commonly used material model of machine and structural elements?

Homogeneous, isotropic, linearly elastic material

What is the valid law for the commonly used material model of machine and structural elements?

Hooke's law: σ = E·ε

What are the characteristic features of springs as structural elements?

They change their shape to a great extent under load without damage

Name two functions of springs as mentioned in the text.

Energy storage, damping, return and dynamic systems matching Signup and view all the answers

What is the apparent modulus for compression denoted as?

E* Signup and view all the answers

When can we apply the equations known from the theory of elasticity for rubber springs?

When substituting the apparent modulus (E*) for Young's modulus (E) Signup and view all the answers

How is the compression calculated for rubber/polymer springs?

σmeg = ε * E* Signup and view all the answers

What are the recommended boundary situations for rubber springs?

Static and Dynamic Signup and view all the answers

What are the main types of air springs mentioned in the text?

Piston type and Bellow type Signup and view all the answers

What is the pressure limit mentioned for air springs?

10 bar (1 MPa) Signup and view all the answers

What is the dependency of the apparent modulus on in the case of rubber springs for compression?

Shore hardness Signup and view all the answers

When can the apparent shear modulus of elasticity be considered constant?

Ratios greater than a given shape factor Signup and view all the answers

How is the shearing calculated for rubber/polymer springs?

τmeg = γ * G* Signup and view all the answers

What are the main use boundary situations for rubber springs?

Measuring system bases, machinery bases, railway block suspensions, air & gas springs Signup and view all the answers

What are the two main types of air springs?

Degressive and Progressive Signup and view all the answers

What are the characteristics of lorry air springs?

Lorry air springs have specific characteristics. Signup and view all the answers

What are the different functions of springs discussed in the text?

Dynamic systems matching, vibration damping, force and torque measurements, force limitation Signup and view all the answers

What are the two types of damping mentioned in the text?

External (structural) Coulomb friction and internal (viscous) damping Signup and view all the answers

What are the elements discussed in the rheology of damping for external Coulomb friction (structural damping)?

Hooke element and Saint-Venant element Signup and view all the answers

What are the elements discussed in the rheology of damping for internal viscous damping?

Hooke element and Kelvin-Voight element Signup and view all the answers

Name some materials from which springs are made according to the text.

Metal, rubber, polymer Signup and view all the answers

What are the steps involved in the manufacturing process of springs mentioned in the text?

Coiling, hardening, shot peening, setting, coating Signup and view all the answers

Name some specific types of springs mentioned in the text.

Compression, extension, torsion, bending Signup and view all the answers

What methods and tools are used for the calculation of springs according to the text?

Nomograms, handbooks, manuals Signup and view all the answers

What is the utilization factor in the calculation of metal springs (load case)?

The energy stored in a unit volume Signup and view all the answers

What are the various types of springs discussed in the text?

Tensioned (compressed) beam, leaf springs, coil springs, and spiral springs Signup and view all the answers

Provide an example of an application for leaf springs mentioned in the text.

Vehicles Signup and view all the answers

What does the text mention about the stress distribution theory for coil springs?

The text discusses the stress distribution theory and reality for coil springs, as well as the correction factor and utilization. Signup and view all the answers

What is the advantageous use of rubber and polymer springs, as mentioned in the text?

Compression and shearing Signup and view all the answers

What type of springs are disadvantageous for tension and twisting, as mentioned in the text?

Rubber and polymer springs Signup and view all the answers

What is the application of coil springs mentioned in the text?

Twisting Signup and view all the answers

What is the calculation provided for in the text in relation to simple leaf springs?

Sagging Signup and view all the answers

What is the manufacturing process for coil springs from, as mentioned in the text?

Extruded wire Signup and view all the answers

What is the application of spiral springs mentioned in the text?

Constant bending moment Signup and view all the answers

What are the principles and devices mentioned in the text for hardness measurement of rubber and polymer springs?

Principles and devices of hardness measurement Signup and view all the answers

What is the beneficial effect of rubber and polymer springs mentioned in the text?

Buffering and damping Signup and view all the answers

What is the shape factor mentioned in relation to rubber and polymer springs in the text?

Compression Signup and view all the answers

Study Notes

The text compares the energy stored in a unit volume of a spring with the energy obtained if the spring had a constant state of stress everywhere.
The text discusses various types of springs including tensioned (compressed) beam, leaf springs, coil springs, and spiral springs.
The calculation for simple leaf spring sagging is provided, as well as the manufacturing process for coil springs from extruded wire.
The text covers the applications of various springs such as leaf springs for vehicles, coil springs for twisting, and spiral springs for constant bending moment.
The text discusses the stress distribution theory and reality for coil springs, as well as the correction factor and utilization.
The text mentions the advantageous use of rubber and polymer springs for compression and shearing, their disadvantageous use for tension and twisting, and their beneficial buffering and damping effect.
The text also mentions the principles and devices of hardness measurement for rubber and polymer springs, their behavior at fluctuating loads, and the shape factor for compression.

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Description

Test your knowledge of the calculation of metal springs, including factors such as tensioned beams, working stress, and utilization factor. This quiz covers concepts related to homogeneous state of stress and the energy stored in a unit volume in metal springs.